The word Gayatri literally means the "Song of God". and because it is a divine song, the Gayatri Mantra is motivated by Divinity. it is an invocation to the Light that the Light Itself created for us. When we work with the Gayatri therefore, we are invoking the Light that shines through all Creation. We are making a conscious decision to work with the Light because it is a field of Absolute Intelligence and therefore working with it will make our intelligence absolute.
If you take these things as ideas or a nice philosophy and compare it to the other philosophies, what Plato or Socrates said, ideas against ideas, you are wasting your time. For those who practise the Gayatri Mantra, those who actually do it, it is a real thing, a way of life. It is a way of understanding life, understanding yourself, understanding God, understanding Reality - and living it.